Lock-nut.



No. 805,829. PATENTED NOV. 28, 1905.

c. G. WR RG.

AP IIIIIII 0Nl F I L E D A PR.6, 1905.

mlnnimn zal 29,4 @gaf nut.

UNITED STATES PATENT. YJOFFIUE. CHARLES GEORGE WRISREERG, OE Sr. LOUIS,MISSOURI.

LOCK-NUT.

Specification of Letters Patent.

Patented Nov. 28, 1905.

To all whom, t may concern:

Beit known that I, CHARLES GEORGE WRIS- BERG, a citizen of the UnitedStates, residing at St. Louis, Missouri, have invented a new and usefulLock-Nut, of which the following is a specification.

This invention relates to lock-nuts and its object is to provide, incombination with a nut, a lock device comprising a spring-actuated lockmember located within a cavity in the nut and arranged to engage withthe threads of the bolt when in locked position, and thereby prevent therotation or turning of the nut or bolt relatively.

ln the drawings, which form part of this specification, Figure 1 shows anut embodying my invention locked in position. Fig. 2 is across-sectional view of the nut, showing the locking mechanism when'held inoperative. Fig. 3 is a corresponding view illustrating thelocking mechanism when in position to lock the nut on a bolt. Fig. 4 isa view of the look member removed from the Fig. 5 is a view showing alock member of a slightly-modified construction.

The nut l may be of any shape or size, the only requirement being thatit be of sufiicient size to permit a recess or cavity 2 to be formedAtherein. The recess or cavity 2 is at one side but leads into and beyondone side of the bore and cuts away a portion of wall and threads of thebore, as may be fully understood by reference to Figs. 2 and 3. Withinthe recess or cavity 2 1s located a locking member 3, the innermost endof which is of about equal width with the cavity. That edge of themember 3 which is toward the bore or bolt when the nut is in use isinclined, as shown, so that the outer end of the said member is ofconsiderably less thickness than the inner end. The edge of the lockingmember 3 which is toward the bore or bolt is wedge-shaped, so as to fitbetween the threads of the bolt when applied. The sides of the wedgeportion may be serrated or knurled, as shown at 4 in Fig-5, or maybeleft smooth, as shown in Fig. 4. The opposite or outer wall of themember 3 is arranged to iit against the wall of the cavity2, so that thesaid member will be iirmly held in position and oscillation thereofprevented. A notch or cavity 5 is preferably formed in the inner end ofthe member 3, forming a seat fora Spring 6,which is located in thecavity 2 in the nut and actuates the locking member outward.

As applied inY use the nut l is screwedvto its proper position on thebolt while the member 3 is being held repressed within the cavity 2, asshown in Fig. 2. The member 3 is pushed back and held back against thetension of the spring 6 to position that will permit the nut to beturnedon the bolt without the threads of the bolt rubbing against theedge of the said member 3. After the nut has been screwed home themember 3 is released and the spring 6 exerts itself to force the saidmember outward, wedging the wedge-shaped edge thereof between thethreads of the bolt. Because of the gradual inclination of the wedgeside of the member 3 the tension of the spring is suicient to bind themember very rmly between the threads of the bolt, and it willonlyrelease itself when pressure is applied to the outer end in parallelline with the straight outer wall of the locking member and the cavityin which it rests. The friction between the locking member and the wallof the cavity in which it rests becomes greater when any pressure isapplied to the wedge side of the locking member, as occurs when attemptis made to turn the nut after the locking member once engages with thethreads of the bolt. Furthermore, the threads always run spirally, whilethe locking member 3 extends directly transversely-of the bolt, andhence any attempt to turn the nut ineither direction will cause thewedge member to bind closely against the upper or lower wall of thecavity, depending upon the direction it isattempted to turn the nut.Therefore to remove the nut with the member 3 in engagement with thebolt-threads would require the member 3 to cut away entirely all thethreads of the bolt, as well as a portion of the bolt proper, wlhich forwell-understood reasons is impossib e.

To control the member 3 as required to permit application or release ofthe nut, I locate a block 7 in the open end of the cavity and a screw 8in a threaded hole in the block. The screw 8 has a spindle 9 on itsinner end, which projects into a hole 10 in the end of the member 3,said hole being larger than the spindle, so that the said member 3 mayhave free lateral movement so far as the spindle is concerned. Thespindle 9 is parallel with the outer edge of the member 3, so that whenthe member is locked with the bolt the screw 8 by being turned willcause the spindle 9 to push the member backward out of engagement withthe bolt. The screw 8 is so adjusted when it is desired to apply the nutin order that the nut may be freely turned without interference from themember 3. After the nut is screwed home the screw 8 is turned to releasethe member 3, and the spring 6 then acts to engage the said member withthe bolt. Preferably the entrance to the hole 10 is enlarged, asindicated at l1, to insure entrance of the spindle in first adjustmentof the parts.

l am aware that many variations and alterations of the parts or their`combination may be made-such, for example, as locating two or more ofthe locks in one nut. This and other variations l have contemplated, andthey may be embodied in devices of this class without in the leastdeparting from the nature and principle of my invention.

Having described my invention, what l claim as new, and desire to secureby Letters Patent, is-

1. A nut having a cavity extending transversely of its bore, a lockingmemberclocated within said cavity, said locking member being provided onone end with a notch 5, and on the opposite end with a hole 10, theentrance to said hole being larger than the remaining portion, a block 7having a threaded hole therein fastened in the entrance of the cavity inthe nut, a screw operatively located in said threaded hole, said screwhaving a spindle of smaller diameter than the hole 10 extending intosaid hole, and a spring having one end bearing in the said notch 5 andthe opposite end against the wall of the cavity in the nut,substantially as specified,

2. A nut having a cavity extending transversely of its bore, theouterwall of the cavity being a plane, a locking member having a hol'ein one end, located within said cavity and bearing against the saidouter wall of the cavity, a spring against the end of the lock ingmember which is opposite from the hole, ablocl fastened in the entranceof the cavity, and a screw operatively carried by said block and havinga spindle of smaller diameter than the hole in the locking member,projecting into said hole, substantially as specified.

3. A nut having a cavity extendin transversely of its bore, a lockingmember ocated within and bearing closely against the outer wall of saidcavity, said locking member being provided on one end with a notch 5,and on the opposite end with a hole 10, extending parallel with theouter edge of the locking member, a block secured in the entrance of thecavity in the nut, and a screw operatively carried by said block, andsaid screw having a spindle of smaller diameter than the hole 10,extending into said hole, substantially as described.

4. A nut having a cavity extendinof transversely of its bore, a lockingmemberocated within and bearing closely against the outer wall of saidcavity, said locking member being provided on one end with a hole 10, ablock secured in the entrance of the cavity and having a hole therein inalinement with the hole in the locking member, a movable member locatedin said hole formed in said block and projecting into the hole l0 in thelocking member, and a spring against the end of the locking member,which is opposite from the hole 10, substantially as shown anddescribed.

ln testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES GEORGE WRISBERG.

Witnesses:

l/VILLIAM C. WRISBERG, FREDERICK WILLIAM DUENCKEL

